Effect of split application of nitrogen at different growth stages on grain yield in late sown wheat (Triticum aestivum L.)

Field research was conducted at the Department of Agriculture research farm, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala while the Rabi season of 2022. with eight treatments, In order to set up the experiment, a randomized block design was used: T₁: (Control), T₂: (100% RDN @ sowing), T₃: (50% RDN @ sowing + 50% @ CRI stage), T₄: (50% RDN @ sowing + 50% @ tillering stage), T₅: (50% RDN @ sowing + 50% @ jointing stage), T₆: (50% RDN @ sowing + 25% @ CRI stage + 25% at tillering stage), T₇: (50% RDN @ sowing + 25% RDN @ CRI stage + 25% RDN @ flowering stage) and T₈: (25% RDN @ sowing+ 25% RDN @ CRI stage + 25% RDN @ jointing stage + 25% RDN @ flowering stage). In this research the hybrid variety of wheat HD-2967 was taken. The results from the data under this research revealed that by the application of 25% RDN @ sowing+ 25% RDN @ CRI stage + 25% RDN @ jointing stage + 25% RDN @ flowering stage) the recorded highest in all parameters like growth attributes, yield and its attributes and economics. Highest grain yield, straw yield and biological yield was (48.26, 57.99, 106.25 q ha^-1) respectively. Among all the treatments, the application of (25% RDN @ sowing+ 25% RDN @ CRI stage + 25% RDN @ jointing stage + 25% RDN @ flowering stage) recorded highest in all plant height at harvest, at 30, 60, 90 and at harvest stage DAS. Yield and its attributes like harvest index, grain yield and straw yield and biological yield was also observed under T₈ (25% RDN @ sowing+ 25% RDN @ CRI stage + 25% RDN @ jointing stage + 25% RDN @ flowering stage).